US12322798B2ActiveUtilityA1

Positive electrode active material for secondary battery, and secondary battery

Assignee: PANASONIC IP MAN CO LTDPriority: Oct 30, 2019Filed: Oct 13, 2020Granted: Jun 3, 2025

Est. expiryOct 30, 2039(~13.3 yrs left)· nominal 20-yr term from priority

Inventors:Ryuichi Natsui Mitsuhiro Hibino

H01M 10/0525H01M 2004/028H01M 4/525C01P 2006/40C01P 2002/52C01G 53/50H01M 4/364H01M 4/485H01M 4/131H01M 10/052Y02E60/10H01M 4/505

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Abstract

This positive electrode active material is for a secondary battery and contains a lithium transition metal complex oxide. The lithium transition metal complex oxide is represented by general formula Li x Mn y Ni z Sb a O b F c (x+y+z+a≤b+c=2, 1≤x≤1.2, 0.4≤y≤0.8, 0≤z≤0.4, 0<a<0.01, and 1.8<b<2 are satisfied) and does not include Co.

Claims

exact text as granted — not AI-modified

The invention claimed is: 
     
       1. A positive electrode active material for a secondary battery, the positive electrode active material comprising a lithium-transition metal composite oxide,
 the lithium-transition metal composite oxide represented by the general formula Li x Mn y Ni z Sb a O b F c  wherein x+y+z+a≤b+c=2, 1≤≤1.2, 0.4≤y≤0.8, 0≤z≤0.4, 0&lt;a&lt;0.01, and 1.8&lt;b&lt;2 are satisfied, the lithium-transition metal composite oxide including no Co, 
 wherein the general formula satisfies 0.002≤a≤0.005. 
 
     
     
       2. A secondary battery comprising: a positive electrode including the positive electrode active material for a secondary battery according to  claim 1 ; a negative electrode; and an electrolyte.

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